135638166 has 16 divisors (see below), whose sum is σ = 273074688. Its totient is φ = 44913000.

The previous prime is 135638149. The next prime is 135638171. The reversal of 135638166 is 661836531.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73950 + ... + 75761.

It is an arithmetic number, because the mean of its divisors is an integer number (17067168).

Almost surely, 2^135638166 is an apocalyptic number.

135638166 is an abundant number, since it is smaller than the sum of its proper divisors (137436522).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135638166 is a wasteful number, since it uses less digits than its factorization.

135638166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149867.

The product of its digits is 77760, while the sum is 39.

The square root of 135638166 is about 11646.3799525861. The cubic root of 135638166 is about 513.7998458631.

The spelling of 135638166 in words is "one hundred thirty-five million, six hundred thirty-eight thousand, one hundred sixty-six".